/Engine/Source/Runtime/Slate/Public/Framework/Application/SlateApplication.h
virtual bool OnTouchForceChanged ( const FVector2D & Location, float Force, int32 TouchIndex, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) PlatformUserId, [FInputDeviceId](API\Runtime\Core\Misc\FInputDeviceId) DeviceID )